My Home Assistant Installation is pretty in-depth and I've gotton some questions about it, so I thought I'd post the main files here. Hope it helps some other folks.
The main customizations involve aquarium timers syncing with weather and tide data, and api links to a reef-pi build.
See the wiki for more details: https://github.com/sfgabe/home_assistant/wiki/Custom-Home-Assistant-Config-with-Reef-Pi